<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>welcome</title>
</head>
<body>
<h1>index,欢迎你</h1>
<form action="/saveuser" method="post">
    姓名：<input name="userName" value="zhangsan" /> <br>
    年龄：<input name="age" value="18" /> <br>
    生日：<input name="birth" value="2019/12/10" /> <br>
    宠物姓名：<input name="pet.name" value="阿猫" /> <br>
    宠物年龄：<input name="pet.age" value="5" /> <br>
    <input type="submit" value="保存">
</form>
</body>
</html>
